Method for producing a piston and piston

Patent metadata

Field	Value
Publication number	US-11278993-B2
Application number	US-201917058154-A
Country	US
Kind code	B2
Filing date	May 22, 2019
Priority date	May 24, 2018
Publication date	Mar 22, 2022
Grant date	Mar 22, 2022

Abstract

A piston and a method for producing a piston which can be secured to a piston sliding unit is provided. The piston sliding unit can be moved along its longitudinal axis in a cylinder. The piston includes a disc-shaped base body, wherein the piston is suitable and intended to seal two regions of the cylinder filled with a medium against one another. The method includes the following steps: a) producing the piston by pressing a material into a piston mold; b) smoothing the surface of the piston and/or pressing at least one flow path into the piston, by an embossing tool, which has a raised and rotationally symmetrical structure.

First claim

The invention claimed is:

1. A method for producing a piston, wherein the piston is attachable to a piston sliding unit, wherein the piston sliding unit is movable along its longitudinal axis in a cylinder, wherein the piston has a disc-shaped base body, wherein the piston is suitable and intended to seal two regions of the cylinder filled with a medium against each other, and wherein the piston comprises an annular piston collar,
the method comprising the steps:
a. producing the piston by pressing a material into a piston mold;
b. pressing at least one flow path into the piston by an embossing tool which has a raised and rotationally symmetrical structure,
wherein the raised and rotationally symmetrical structure of the embossing tool has at least one point of intersection with the annular piston collar when placed on the piston,
wherein the raised and rotationally symmetrical structure of the embossing tool crosses the annular piston collar from a side facing a piston center to a side facing away from the annular piston center at the at least one point of intersection, and
wherein the annular piston collar is at least partially pressure-formed into a flattened and/or recessed shape by pressing the raised and rotationally symmetrical structure into the piston at the at least one point of intersection.

2. The method according to claim 1 , wherein the annular piston collar has at least one meander-shaped convexity and/or concavity, which has at least one section oriented radially and one section oriented tangentially to the piston.

3. The method according to claim 2 , wherein at least one point of intersection of the rotationally symmetrical structure of the embossing tool is arranged within the at least one meander-shaped convexity or concavity of the annular piston collar.

4. The method according to claim 2 , wherein at least one point of intersection of the raised rotationally symmetrical structure of the embossing tool is arranged in the at least one section oriented radially to the piston of the at least one meander-shaped convexity or concavity of the annular piston collar.

Assignees

• Stabilus Gmbh

Inventors

• Löhken Lars
• Müller Markus
• Piroth Raphael
• Probst Ulrich

Classifications

• F16F9/3271 Primary

  Assembly or repair · CPC title

• B23P15/10 Primary

  pistons · CPC title

• F16F9/3214

  of pistons (F16F9/0227 and F16F9/36 take precedence; throttling passages in or on piston body F16F9/3405) · CPC title

• F16F2226/04

  Assembly or fixing methods; methods to form or fashion parts · CPC title

• F16F2226/02

  Surface treatments · CPC title